US3784951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin film resistors
Assignee: AT&T Inc
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Filing: 1970-12-16
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Granted: 1974-01-08
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Expires: 1990-12-16
Abstract
Abstract Thin film resistors may be obtained by depositing tantalumaluminum films containing from 25-60 atom per cent aluminum upon an insulating substrate member by conventional condensation techniques and on anodizing the deposited film.
Inventors
- 👤 C Steidel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:53
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C23C14/18; C23C14/185; H; H01; H01C; H01C17/00; H01C17/06; H01C17/075; H01C17/12; H01C7/00; H01C7/006; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A stable metal film resistor including successively a nonconducting substrate and a thin film consisting essentially of an anodized tantalum-aluminum alloy consisting of from 25-60 atom percent aluminum.
Claim 2
Dependent Claim
28 words
A stable metal film resistor including successively a nonconducting substrate and a thin film consisting essentially of an anodized tantalum-aluminum alloy consisting of from 25-60 atom percent aluminum.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |